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Finding the Fourth Proportional to 70,810.20, 106,215.30 and 64,905.30

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Solution

The fourth proportional to 70,810.20, 106,215.30 and 64,905.30 is: 97,357.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,810.20 : 106,215.30 = 64,905.30 : x
  2. Step 2: Convert to fraction form
    70,810.20/106,215.30 = 64,905.30/x
  3. Step 3: Cross multiply
    70,810.20x = 106,215.30 × 64,905.30
  4. Step 4: Simplify right side
    70,810.20x = 6,893,935,911.09
  5. Step 5: Solve for x
    x = 6,893,935,911.09/70,810.20
  6. Step 6: Final answer
    x = 97,357.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.